You have done what you need to do as far as reporting this to the authorities go.. You need to make sure that there are no images cached on your computer.
You may find that there are images hidden which you don’t know about and although we are not computer experts, it might be worthwhile taking it to a computer shop to get the hard drive wiped and your own software reinstalled.
The last thing that you want is to be under suspicion of having these images on your computer and having only reported the matter to crimestoppers to try to cover your own back.
Can I clarify anything for you?
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We can still exchange emails.
Good idea. You have reported as much as necessary